Selection Key Context Key Context at grizzly. Abstract Thread Pool$Work(Abstract Thread at Edit: I have found form the stacktrace that exception is coming on this line Workbook workbook = new Workbook(Path, load Options);.Abstract Thread Pool$ Thread at Utility.convert Excel( at Native Method Accessor Impl.invoke0(Native Method) at sun.reflect.

Application Filter Filter(Application Filter at org.primefaces.webapp.filter.

File Upload Filter(File Upload at org.apache.

It's probably either JDK 1.6 default implementation (Sun's SJSXP), or Woodstox; or if you are unlucky, stax reference implementation...

(unlucky since it is buggy) These are also most common reasons why naive java testing benchmarks give useless results: if you do not account for both (i.e. Validating Stream Reader) are used in my code unintentionally.

As you have stated, I believe that the behaviour of the inconsitent results in the intial runs should be due to JIT.

Yes, it should be sufficient as jar contains META-INF/services entries to 'register' woodstox as a stax impl.

So now I am stuck here and unable to find why this is happening?

Note: In search of this problem, I found this answer on aspose forum but it is not helpful and feasible(to check all the classes present in jars placed in lib).… We recommend you to kindly try our latest version of the product (e.g v7.7.x (JAVA)) as we did remove some inter dependencies jars and have written/included our own custom XML parsers to perform some XML operations in the product.

Http Protocol Chain.execute(Http Protocol at grizzly.